Watford
Trail Running Calendar near Watford 2026-2027
Explore the top trail runs near Watford for 2026-2027! We've gathered 235 exciting trail runs in the area. Check out our detailed list below to find your next local trail run.
June 2027
A ten-leg team relay along sections of The Ridgeway national trail covering the 86.5 mile route, organised by Marlborough Running Club with gender composition rules.
Women only trail event in Surrey offering 50 km, 25 km and 10 km routes from Denbies Vineyard with signed courses, aid stations and downloadable GPX maps.
July 2027
An 82 mile point-to-point ultramarathon from Epping to Harwich along mixed trail and road, with checkpoints, GPS tracking, a race medical team and a 24 hour cut-off.
A 5 km outdoor obstacle and mud course in Brentwood on 3 July 2027 that raises funds for Essex Wildlife Trust; entry is £40 with a suggested £100 fundraising pledge.
A fully marked off road half marathon on The Ridgeway between Wendover and Princes Risborough, covering 21.1 km with 526 m ascent and two aid station visits.
Group guided 10 km trail run across the boardwalk and heathland of Thursley National Nature Reserve with evening and night options, car parking and a post-run alcohol-free beer.
Trail event along the Ridgeway with 50 km and 100 km options finishing at Avebury Standing Stones, featuring signposted routes, pit stops, bag transfer and medical support.
A 24 hour multi terrain relay or solo race at Albyns Farm with teams of two to eight running repeated 5.75 mile laps and onsite camping and facilities.
A muddy 5k obstacle course at Fairlands Valley Park in Stevenage with staggered waves, on-site facilities, a minimum fundraising target of £50 and age 13 and over requirement.
ATW St Albans Summer 10K at Highfield Park on 18 July 2027 features a chip timed 10K, a free family fun run and an event village with refreshments and entertainment.
August 2027
A 47 mile point to point ultramarathon along the Thames from Henley to Kingston, with three checkpoints offering food and drink, mandatory navigation kit and a required average pace to remain in the race.
Timed looped trail at Denbies Wine Estate offering distances from a single 5.3 km loop up to ultramarathon within a seven hour limit, flexible start window and medal options.
Riverside out and back races from Barnes along the Thames Path offering 10km, half marathon and marathon with marked course and checkpoint support.
London Backyard Ultra at Frylands Wood follows the Backyard Ultra format: run four miles each hour until one runner remains, scheduled for 28 August 2027.
September 2027
A family-friendly muddy obstacle run in Brentwood, Essex offering 5 km and 1.5 km routes, on-course obstacles, finish-line facilities and an event village.